T&T: Steel SCUBA tanks

[Bill Allen]

Although I emailed Larry privately there are a bunch of plus's to going 
steel. Bouyancy being the biggest. Alum. 80 (really 77's) require in the 
order of 4 pounds weight just for the tanks. The steel (lo pressure) can be 
filled higher than the dot ratings normally 3500 psi they're european 
pressures. Not as big a problem when filling as overheating alum. is the 
kiss of death for the tank.. You will need to be a little more careful any 
water getting in the tanks when filling (something you should do anyways). 
You might even want to consider going din although there are now valves 
which will do both. The only plus side to alum. cylinders is their intial 
price. Although we now will not fill any alum. tanks over 20 years of age as 
they are now starting to have issues. I strongly recomend steel and have 
only been using them for the past 15 years. Here in the shop we don't even 
have 80's except for some use's as deco bottles where there bouyancy issues 
are desirable.
----- Original Message ----- 
From: "Larry N. Brown" <cigano55 at hotmail.com>
To: "Trawlers and Trawlering" <trawlers-and-trawlering at lists.samurai.com>
Sent: Tuesday, September 18, 2007 9:16 AM
Subject: T&T: Steel SCUBA tanks


>I installed the SCUBA compressor aboard Cigano yesterday and filled my 
>first
> tank wth it. An aluminum 80. As I watched the pressure build, I decided it
> was time to act on my decision to purchase steel tanks. I would appreciate
> any recommendation as to manufacturer and seller.
>
> Regards,
>
> Larry and Teri
> M/V Cigano, 47' Prairie Sundeck Cruiser
> Lying: Covington, LA
> N 30 26.7
> W 90 07.1
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